Comment to: The chemical mediators of some sclerotherapy complications (Les médiateurs chimiques dans certaines complications de la sclérothérapie), by Ferrara F, Ferrara G. Phlébologie 2012;65:27-31. (2012). Veins and Lymphatics, 1(1), 3. https://doi.org/10.4081/ByblioLab.2012.3